Skip attachment for excavator-buckets.



E. R. SHNABLE.

S'KIP ATTACHMENT FOR EXCAVATOR BUCKETS.

APPLICATION FILED SEPT-16,1916- l ,266, l 68, Patented May 14; 1918.

2 SHEETS-SHEET I.

E. R. SHNABLE.

SKiP ATTACHMENT FOR EXCAVATOR BUCKETS'. APPLICATION HLED SEPT. as. 1916.

1,266,168. Patented-May 14, 1918.

, 2 SHEETS-SHEET 2.

ITE STATES PATENT OFFICE.

EMILE R. SHNABLE, OE WILMETTE, ILLINOIS, ASSIGNOR 'IO BROWN HOISTING MACHINERY COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF DELAWARE.

SKIP ATTACHMENT FOR EXCAVATOR-BUCKETS.

Specification of Letters Patent.

Patented May 14, 1918.

Application m September 1c, 1916. Serial No. 120,428.

To all whom it may concern:

Be it known that I, EMILE R. SHNABLE, a citizen of the United States, residing at IVilmette, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Skip Attachments for Excavator-Buckets, of which the following is a specification.

The present invention relates to improvements in excavating machinery, and more particularly is concerned with excavators of the drag-line type.

In the operation of drag-line excavators now commonly employed, and more especially when the bucket digs above its roller path, a ridge of material generally is left directly in front of the machine, due to the rise of the bucket after the cut is made and as it is elevated for dumping. The presence of this ridge prevents the machine from moving up to the work until the ridge is re moved. This requires the use of hand labor, with its attendant expense, and delay in repositioning the excavator also is incurred. To overcome the conditions noted, the present invention has in contemplation the use of a skip or auxiliary receptacle as an attachment for the excavator bucket which is designed to be positioned in front of the machine in the path of movement of the bucket toward the machine and adapted to receive the material pushed in advance of or left by the bucket as the latter is elevated for dumping. When, therefore, the skip becomes filled with the loose material deposited therein by the movement of the bucket, the skip may be hoisted and dumped, the excavator advanced toward the work, if the execavation has progressed sutliciently far to require repositioning of the excavator, and the skip again placed in the path of the bucket for further loading thereby. Under these circumstances the material is bodily removed, suitable means being provided for connecting the bucket and skip and elevating and dumping the latter by the excavator itself, and the expense and delay incident to the use of hand labor are entirely avoided.

The invention is fully illustrated in the accompanying drawings, hereinafter specifically described, and its novel features finally pointed out in the appended claims.

In the drawings- Figure 1 is a diagrammatic view illustrating the conditions of use of the present day excavator of the drag-line type and the conditions designed to be overcome by the present invention.

Fig. 2 is a similar view with the present invention incorporated as a part of the excavating equipment.

Fig. 3 is a view illustrating the dumping action of the excavator bucket and the skip connected thereto.

Fig. 4: is a side elevation of the excavator bucket, on an enlarged scale, with the skip attachment connected thereto and in the position assumed thereby when being transported for dumping.

Fig. 5 is an end elevation of the construction illustrated in Fig. a, viewing the same from the open side of the skip.

Fig. 6 is a perspective view of the skip detached.

Referring now to the accompanying drawings, the numeral 10 designates schematically an excavating machine of the dragline type having a mast or derrick 11, the boom 12 and the excavating bucket 13. The latter may be of any approved type, but is preferably the Shnable bucket now commonly employed.

In the operation of the type of excavator above referred to, and more particularly as illustrated in Fig. 1, when the bucket 13 is drawn toward the machine in the excavating cut, it leaves a ridge of material desig nated by the numeral 14 directly in front of the machine. This is due to the rise of the'bucket after the out has been made and as it is elevated for dumping. Before the machine can be advanced to the work it is necessary to remove this ridge by hand labor, as previously recited herein, so that it is highly desirable that means be provided to prevent the formation of this ridge. To this end the invention contemplates the use of a skip 15, illustrated more in detail in Fig. 6. This skip is formed of suitable material and is of such capacity that it will not require emptying with each cutting movement of the excavator bucket 13. Its capacity may be proportioned to the capacity of the excavator bucket. The skip 15 includes a bottom 16, side walls 17, and a rear wall 18, the front edge of the skip being open to permit passage of the material as the excavator bucket 13 advances toward the skip. Ad

jacentto the upper edges of each of the side walls 1'? the latter are provided with a plurality of openings 19 designed to receive a plurality of hooks 20 to which suspensory chains 21 are connected and the free ends of these chains 21 are likewise provided with hooks The hooks at the forward end of-the-skip are adapted to engage openings formed in the sides of the bucket 13 adjacent to its rear end, while the hooks at the rear end of the skip are received by openings 2t formed in depending clips connected to the bail ot'the bucket 13.

The length of the chains 21 is such that with the bucket 13 in its closed position, as illuetrtu'ed in Fig. t, the skip 17 will be held in substantially horizontal position and thereby preve ted from tilting with its contents. in such position, when the bucket 13 is elevated and the skipis connected thereto, the skip will be carried without liability of dumping until the bucket 13 itself is properly manipulated for this purpose.

In using the herein described invention, the skip 15 is positioned in front of the excavator prior to making the first cut, as illustrated in Fig. As the bucket 13 is dragged over the material to be excavated, it becomes tilled with the material in the usual manner. The open side of the skip is, of course, directed toward the bucket 13 and as the latter advances to the machine it pushes the material into the open side of the skip, so that the loose material which otherwise would be left as the ridge it in Fig. 1 is received by the skip 15. After a succession of cuts by the bucket 13, according to the capacity of the skip 15, the skip becomes filled, whereupon the chains 21 are connected to the bucket 13 by having the hooks 22 engaged with the openings and 2 t of the bucket. Thereupon the bucket is lifted in the usual wa v as when conveying the same to its dumping position and on the proper manipulation of the cables to effect the dumping movement of the bucket 13, the skip is tilted with its open side downward and the contents thereby displaced theretrom. The skip is then repositioned in front of the machine, to be filled again and dumped in the manner described, and this succession of operations is repeated until itis necessary to reposition the excavator with respect to the work, at which time the machine mav be advanced immediately and without the delay attendant upon the removal of the accumulated material heretofore machine.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

1. In an excavating machine of the class described, the combination with the excavator and its bucket, of an auxiliary receptacle adapted to be positioned between the excavator and the material to be removed ant in the path of movementof the excavator bucket, whereby to receive charges of material incidental to the movement of the excavator bucket, and means for connecting said receptacle to said bucket tor elevating and dumping the receptacle of its contents.

2. In a machine of the class described, the combination with an excavator and its bucket, of an open sided receptacle adapted to be positioned between the excavator and the material to be removed, with its open side directed toward the path of the excavator bucket in its cutting movement, and means for connecting said receptacle with said excavator bucket to hoist the receptacle and dump the contents thereof.

3. In a machine of the class described, the combination with an excavator and its bucket, of a skip attachment for the bucket, comprising an open sided receptacle adapted to be positioned between the excavator and the material to be removed and having its open side directed toward the path of the exca vator bucket in its cutting movement, and suspensorv devices for connecting the skip attachment with the excavator bucket to adapt the latter for hoisting the skip attachment and to dump the contents thereof.

l. In a machine of the class described, the combination with an excavator and its bucket, of a skip attachment for said bucket, comprising a receptacle open at one of its sides and adapted to be positioned between the excavator and the material to be removed, the open side of the receptacle being projected toward the excavator bucket in tl e path of its cutting movement, and detachable connections between said skip attachment and the excavator bucket for con necting the skip attachment with the bucket to elevate and dump the contents of the skip attachment.

remaining in front of the EMILE R. SHNABLE.

In the presence ot' ivlIL'rox T. MILLER, ll ILLIAM N. CRoMwnLL.

estes this may be obtained for five cents cam, my addressing the fionnnissioner of retinitis. 

